Sand-blast tank and filling valve



March 26, 1929. R. H. MOORE 1,706,737

SAND BLAST TANK AND FILLING VALVE Filed Sept. 19, 1923 2 Sheets-Sheet l IU I .14 9 I 5 8 l "Ummw Q- 'W. 7

Z I E i f fiwica/ \jgorg/ March 26, -1 929.

R.- H. MOORE SAND BLAST TANK AND FILLING VALVE Filed Sept. 19. 1923 2 Sheets-Sheet 2 Patented Mar. 26, 1929. i 2

Jo NITED'S'TA RAYMOND I-I. MOORE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE AMERIeAiv FOUNDRY EQUIPMENT. COMPANY, OF NEW YORK, N. Y A CORPORATION OFOHIO.

SAND-BLAST TAN Ann FILLING VAL E.

Application filed September 19, :1923. Serial No. 663,656. I

My invention relates to sand blast tanks for sand blasting apparatus and to valves I for filling said tanks.

One of the objects of the invention is to provide a simple, practical and durable construction of filling valve for sand blast tanks.

Another object of the invention is to pro-.

vide a construction of such valve as will 1o avoid the pulling or blowingof the sand in the hopper, as is nowcommonly done when the filling valve is opened by a reduction of air pressure in the tank. v

Another ob 'ect of the invention is to seeuro quick and effective operation in such a valve. In the accompanying drawings, vertical sect-ion ofa sand hopper and filling tank and filling valve embodying the invention,

' Fig. 2 is a vertical section of the valve in a Closed conditioinancl i Fig. 3 is a similarsection with the valve partially closed and partially opened.

Referring to thedrawings, 1 is a sand hopper to receive sand to be used for sand blasting purposes. Below hopper 1 is a sand blast tank 2 to receive sand from hopper 1 to deliver it to blasting nozzle. Between hopper 1 andtank 2 is valve mechanism 3 for controlling flow of sand from hopper 1 to tank 2.

The valve mechanism 3 comprises a duplex or two part valve, having an upper mushroom part 4 and a lowe'rcylinder part Part 4 controls openingfi in bottom of hop per 1, opening or closing the same when in lower or upper position,respectively. Part 4 has a stem 7 adapted to slide inaperture parts 4 and 5 Part 5has side openings 8 through WlllCliCOlIlPlGSSGCl air may pass into.

tank 2. Part 5 is verticallyadjustablein a tubularmember 9, being shown elevated in Fig. 2, and lowered in Fig. 3. v I

Compressed air pipe 10 leads from mem her 9 to outside of-tank, where it is under-- Fig. 1 is a venting the tank.

13 in part 5, to permit relative movement of socket 15 and thereby maintain said valve parts in al'inement.

In operation, when the sand blast is not operating, the valve will be open, as shown in Fig. 1', both parts 4 and 5 being'down to permit sand to flow from hopper 1 into tan'k2. When sand blast is turned on,however, both parts 4 and .5 will be elevated by air pressure, part 5 pushing part 4 up, thereby" closing bottom opening of hopper and preventing escape of sand tofilling tank, as

shown in'Fig. 2. Part 5 will .then drop, due

to the fact that there is substantially no flow ES PATENT OFFICE. i j

of air into the tank through cylinder 9.

Part 4 will remain up, however, and will from thetank, thereby so reducing the pressure withinthe tankthat there will be no tank 2 has become a minimum. I

It will be understood that changes and modifications may be made without departing from the spirit of the invention. What I claim is: I

1. The combination with a hopper and tan-k of a lightvalve slidable on and opera-v ble by a slidable member to close the valve opening, said member being returned to its normal position as soon as the said opening is closed, and an opening in said member for 2; The combination with a hopper and a tank, of a twopartvalve' at the opening be- 3. A valve device comprising two parts,

close outlet of hopper'l until air isreleased to be as light as possible, so that it will re- 3 i main in raised position until the pressure in tween the same, one of the parts. of said tank when the supply pressure one of which is adapted for movement relatively to the valve casing and the other of which is carriedby the first mentioned part and adapted for-movement relatively to the same, the second mentioned part havingthe valve closing structure and the first mentioned part having a venting, aperture.

4. A vnlve device comprising two parts, one oi WlllCll 15 adapted for movement relatively tolhe valve casing and the other of which is carried by the first mentioned portund adapted for movement relatively to the provided with a crosswise portion forming a 10 battle and having an aperture for the valve stem and also having venting; apertures.

In Witness whereof, I hereunto subscribe my name this 10th deyof September, A. 1)., 1923. 7

RAYMOND H. MOORE. 

